Patents by Inventor Liat-Chaw Lie

Liat-Chaw Lie has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Display board assembly
    Patent number: 5020253
    Abstract: A display board assembly, which includes a start unit connected to an end unit with a variety of intermediate display units set in therebetween in a line. By means of color contrast and diaphaneity difference the symbols on the intermediate which show a certain meaning collectively can be clearly seen in the day. When in the dark, a photosensor automatically triggers the light emitting diodes of the intermediate display units to illuminate the symbols thereon.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: June 4, 1991
    Inventors: Liat-Chaw Lie, Huang K. Suen